On my short drive with several lane changes, it never failed to make the change. Of course this is very limited data.
I noticed the more prominent proximity lines, and I like that, except that it's usually because I'm next to a curb. Cars passing me on the left go through my "blind spot" without causing any proximity warnings. (I don't have much of a blind spot with correctly adjusted mirrors.)
What's "reverse mode" for side mirrors?
My backup camera seems unchanged. But I had no issues with it before. It is not linear. But if it was I don't see how it should show me a wide enough angle. I think it needs to be fish-eyed, so I can see off to the side. BTW, I really like the backup camera when I pull into my garage because the car barely fits, and the camera shows me when I've pulled in far enough that the door can close.
I don't think you're supposed to squeeze the steering wheel. I think it's looking for a slight resistance to being turned, not a squeezing pressure on the wheel. Holding the wheel lightly and allowing the weight of my arms to pull slightly seems to provide enough resistance to satisfy the car, both before and after this update.